Piano-damper.



PATENTED JUNE 2 B. B-ORNHOEFT.

PIANO DAMPER. APPLICATION FILED MAR. 1a, 1903.

N0 MODEL.

PIC-I1. 3.

FIG. 2..

wnlorums NCRRIS Pz'rkns so. woro-umo WA HINGYON. my C UNITED STATESPatented June 2, 1903.

PATENT OFFICE.

EDWARD BORNHOEFT, OF NEW YORK, N. Y., ASSIGNOR TO DAVID H. SCHMIDT, OFNEW YORK. N. Y.

PIANO-DAM PER.

SPECIFICATION forming part of Letters Patent N 0. 729,533, dated June 2,1903.

Applioation filed March 18, 1903. Serial No. 148,294. (No model.)

To aZZ whom it may concern:

Be it known that I, EDWARD BORNHOEFT, a citizen of the United States,residing at New York city, (Bronx,) county of New York, and State of NewYork, have invented certain new and useful Improvements inPiano-Dampers, of which the following is a specification.

This invention relates to a piano-damper which is so constructed that anaccurate adjustment between the damper and the strings may be readilyefiected.

In the accompanying drawings, Figure l is a side view of my improvedpiano-damper; Fig. 2, an end view thereof. Figs. 3 and 4 are oppositeside Views of the damper-block; Fig. 5, a bottom view thereof; Fig. 6, aside view of the upper end of the damper-wire, and

Fig. 7 a vertical cross-section through the center of the damper.

The letter a represents a slidable damperblock carrying a cushion b ateach end above the strings 0. At its center and between the cushionsthere is formed in the bottom of the block a a tubular mortise a,communicating at its upper end with a tapped perforation a The mortise aopens at one side into an upright slot a and at its other side into arecess a The damper-wire cl is doubled at its upper end, thedownwardly-extending arm d carrying a tubular sleeve e. Into this sleeveis fitted a tight core e, provided with a tapped axial perforation e andwith a second upright perforation into which the arm d is fitted. Thesleeve and core collectively constitute a tapped and perforated head.The thread of the axial perforation 6 runs in a direction opposite tothat of the perforation a both perforations being engaged by a commonright-and-left screw f, the head f of which projects centrally upwardfrom the damper-block a.

In assembling the parts the sleeve 6 is received by the mortise a, theupper end of wire of is received by the slot u while the recess a servesto accommodate the wire of the adjoining damper-block. The screw f on being inserted will connect the head to the damper-block, and by turningthe screw in either direction the damper-block will be moved upward ordownward along the head, so that the elevation of the cushions b abovethe strings 0 may be readily adjusted.

It will be seen that by my invention the screw for effecting theadjustment is readiiy accessible, the damper-block is properly guidedduring its movement along the head, and an accurate adjustment may thusbe easily effected.

What I claim is- 1. A piano-damper composed of a damperwire, a tappedhead secured thereto, a tapped mortised damper-block, and a screw thatengages the block and head, substantially as specified.

2. A piano-damper composed of a damperwire having a bent upper end, atapped head secured thereto, a tapped mortised damperblock, and aright-and-left screw that engages the block and the head, substantiallyas specified.

3. In a piano-damper, a tapped damperblook having a mortise and acommunicating slot, combined with a damperwire having a bent upper end,a tapped head secured thereto,and a right-and-left screw that engagesthe block and the head, substantially as specified.

Signed'by me at New York city, (Manhattan,) New York, this 17th day ofMarch, 1903.

EDWARD BORNHOEFT.

Witnesses:

WILLIAM SGHULZ, EDWARD RAY.

